Any Region Changer semi-bricked my wii (i changed the video mode on accident), and now whenever I try to run any homebrew I get no signal on my TV. Also when I try to start homebrew channel the screen goes crazy and I can't see anything clearly. I tried reformatting twice, and even upgraded from 3.4 to 4.0. I have BootMii, but I can't really get that to help with anything. And finally, whenever I start bannerbomb, I lose signal on my tv :[

damn man haha u basically either need preloader or bootmii running boot2. from there you also need homebrew working if you do not have access to your nand..

if you did backup your nand it will be a simple fix. if not and you had homebrew working it would be 15 minutes to unbrick it. believe me i did it twice haha just for the video footage to help people like u out.
now for your case where u dont have a nand and dont have homebrew and dont got preloader,...... its not looking good.